Disgaea 5 Complete

Items have ranks and rarity values.

To convert a Legendary item (Yellow) to an Epic Item, you need to bring its Rare Value up to 100.

There are a few ways to increase the Rare Value:

One is to steal a Legendary Item with Artina's Evility that increases Rare by 20 after stealing.
Almaz has an evility called Lucky! that increases the rare of an item found in a chest by 30, you will need to find legendary chests, you might be able to do a combo with Raspberyl's TrashPickup to deathblow chests.
You can pass an Item Assembly Bill to reaise the value by 5
Each time you finish a training battle (in mystery rooms), the rare value also increases.
Each time you conquer NW invaders, you get a training point that improves rarity. Sapphires Bring it On Evility will give you a small boost to your Invader chance.
So, enable that Invader or Mystery Route or get the Explorer Evility (found in Char World) and have it on 3 or 4 characters to consistently go into M.rooms.

Remember that you can duplicate evilities through the Char world by creating scrolls at the end of it so other characters can learn the evilities.

Cheers!@

Once you unlock the Squad shop after a few chapters in the main storyline, assign a unit to the Life Support Squad, you need to enhance the squad with prisoners so you can unlock the ability to punch people inside the base.

The base is your pocket netherworld, so just punch a lot of people while running around in there and this will eventually unlock.

Cheers.

You dont have to have the whole 100 worlds listed in your menu, there is a counter that goes up every time a netherworld is discovered, this one is the one that counts for this achievement.

So feel free to battle those overlords or relax when someone accidentally blows up a netherworld, it still counted when it was discovered.

The fastest way to get this is to get more squads out in the universe.

You increase the squad limit up to a max of 10 as you complete chapters in the main story.

Some other tips:

Every battle advances one day, depending on your squad strengths and levels, the exploration rate will increase.
You can use the megaphone item or the capture squad to solicit high level enemies into your roster and then assign them to exploration squads.
You can recruit characters based off the highest leveled character of your party. A level around 200 or 250 will suffice to tackle R40 worlds.
You can assign people to the research squad at the squad shop, enhance it too so you can discover faster.
Cheers!

This one is tricky if you dont know how to go about it.

In the interrogation room, once you unlock it, there is a Make Citizen option.

Just release 100 prisoners by making them citizens and this achievement will unlock.

The Megaphone item coupled with a Sage is a great way to farm prisoners.

You need to unlock all character classes, some can only be gotten by completing Quest board quests.

Some of these quests only appear as you proceed with the storyline and some are post-content only.

You need to also have at least 5 Stars Class Mastery in every class for this achievement to unlock. (1 short of Mastery)

(5 stars lets you create all Tiers from that class in the recruitment center)

Here is an excerpt from Outside LinkD5 Wiki of the unlock requirement for all classes:

Thief: "Stealing Specialist" - Rank 2 Brawler
Gunner: "Seeking Partner" - Rank 2 Fighter, Rank 2 Mage
Archer: "Hunter Intern" - Rank 2 Fighter, Rank 2 Healer
Professor: "Samples Wanted!" - Rank 2 Gunner, Rank 2 Maid
Ninja: "Assassinations" - Rank 2 Thief, Rank 3 Brawler
Lady Samurai: "Valuing Loyalty" - Rank 2 Archer, Rank 3 Fighter
Armor Knight: "Impregnable Guard" - Rank 3 Fighter, Rank 3 Brawler
Magic Knight: "Magical Warrior" - Rank 3 Fighter, Rank 3 Mage
Wrestler: "Star of the Ring!" - Rank 2 Armor Knight, Rank 3 Fighter
Dark Knight: "Black Knight" - Rank 2 Ninja, Rank 2 Lady Samurai, Rank 2 Wrestler
Pirate: "Space Pirates" - Rank 2 Gunner, Rank 3 Archer, Rank 3 Maid
Sage: "Clandestine Child" - Rank 2 Professor, Rank 4 Magic Knight
Celestial Host: "Celestial Messenger" - Rank 2 Magic Knight, Rank 3 Healer (Note: Quest does not appear until you complete Episode 11.)
Finally, there is one humanoid class that does not require you to rank up other classes to unlock it:

Fake Asagi: "Asagi's Future" - Level up the real Asagi to Level 500. (Note: Quest does not appear until the real Asagi joins you.)

Orc: "Orc Pride" - Episode 2 - Deliver 1 item of any type
Imp: "Pranking Footsteps" - Episode 2 - Deliver 1 item of any type
Undead: "Let's Dance" - Episode 3 - Deliver 1 physical monster weapon of any type
Sludge: "Secret to Jiggling" - Episode 3 - Deliver 1 Unopened Soda
Winged Warrior: "No Ordinary Bug!" - Episode 4 - Defeat 1 Archer
Flora Beast: "Opening Up" - Episode 4 - Deliver 4 healing items of any type
Slumber Cat: "Cute Animal, Meow" - Episode 4 - Deliver 1 Sardine
Nether Noble: "Rules of the Nobles" - Episode 4 - Deliver 1 Angel Cake OR deliver 1 Gold Bar
Shroom: "Eri Eri Poko Poko" - Episode 5 - Destroy 3 'Mushroom' objects
Fairy: "Small Friend" - Episode 5 - Deliver 1 Fairy Dust
Rabbit: "Serious Warrior" - Episode 5 - Defeat 3 Imps
Sea Angel: "Living Conditions" - Episode 6 - Deliver 1 percentage-based healing item of any type
Chimera: "Chimera Problems" - Episode 6 - Deliver 3 magical monster weapons of any type
Nine-Tails: "Colla-tail-ral" - Episode 7 - Deliver 1 "treasure" (Imperial Seal, Dark Rosary, etc) of any type
Bear: "Are We Friends?" - Episode 8 - Deliver 3 muscles of any type
Succubus: "Seductive Demon" - Episode 9 - Deliver 5 Strange Feelers
Felynn: "I Wanna Fight!" - Episode 10 - Deliver 5 fist weapons of any type
Twin Dragon: "Treasure & Dragons" - Episode 13 - Deliver 1 orb of any type that is RARE or LEGENDARY quality
Horseman: "Promised Spear" - Episode 15 - Deliver 1 spear weapon of any type that is LEGENDARY quality
Dragon King: "Hard Boiled Heart" - Final Episode - Deliver 1 weapon of any type that deals fire-elemental damage

To unlock the battle with Carnage Dark, you need to complete a chain of quests given to you by Gorion after you unlock the Carnage Dimension.

There is one quest for each chapter, the stage will appear as Carnage Stage once you grab the quest, so that's around 15 or 16 quests in total.

Carnage Dark is super tough, having around 50M stats all around with lots of evilities and skills that make him very hard to take down.

I was able to kill him with around 40M in my main stat INT and with lots of powerups.

I used succubus and Chimeras to get his stats down, used Celestial hosts to up my own damage.

Plenair,Mao and Rozalin also help give you extra damage.

Being in a full Squad like Foot Squad will give you an extra boost, having several of those members equipped with "Bodyguards" Evility will also help.

Cast Braveheart or Magic Boost on yourself to upgrade your damage too, lasts 2 rounds, you can make a squaddie cast it then move your main char into him so he lifts you up and you can evade 1 attack this way.

Remember to have your cool crit curry boost too.

You might want to pass a Bill in the Dark Assembly to let you dispatch 20 members, Zetta's overload will give you 5 more and if you combo with Petta's, thats 30 members.

Have your awesome weapon ready, beware of the boss's counters.

The reward for beating this dude's is an extra unique evility slot and the achievement 😃

Good luck!

In almost every normal stage, there is a one time bonus in the bonus gauge at level 9.

To unlock this achievement, you need to unlock 50 of these, it might be tricky to get the gauge all the way up to 9 so here are a few tips:

There are one-time use potions called Fill 0.5, Fill Up, Fill G and Fill EX, they fill the gauge by 0.5/1/2/3 levels respectively.

You can create this using the Alchemy Table that unlocks once you finish the game, Item worlds also have a lot of these.

The Dark Assembly has a Bill to boost the Bonus Gauge by 3 as you start the level.

The item Folding Fan increases bonus gain by 5% and the evility Bonus Boost gives you 10%, you can find these as rewards in random quests in the quest shop.

Team attacks and Combo chains fill out the Gauge, the Archer's Support ability is great to get the combos going, you can even do this to your own allies and the gauge will fill. Make sure the ally you are targeting can handle the blows and cant counter, there is an item. You also can do this with assist spells like heals but it gives less.

Critical Hits gives extra points, always have a 100% Crit Curry going and cooking. If you dont know how to do this, its simple, make a custom curry with 100 weapons (fists) in the other category, let the curry sit for 100 days, dont eat it. Go do your stuff. Once the first curry is done simmering for 100 days, eat it and make another. The curry you just ate will last 100 days and while it expires, the curry you just made will simmer for 100 days.

Killing or hitting a lot of enemies at once give extra bonuses, I went back with my Sage and its Land Decimator skill to early stages and was able to get 5 to 6 levels in a single attack. Combine your sage with the Fan and the bonus boost skill for best effects. I found that levels with 10 or more enemies worked best.

You can combine all of the above to get these done right quick.

I wish you patience and good luck!

Mr Egg will sometimes appear in a mystery room and sell his eggs, he will drop the egg on your item world levels and there is a small chance Darkdeth will appear.. I strongly suggest you fight him in a normal item world with Zero difficulty stars. He gets tough in stronger item worlds.

You can trap him in a square where he cant get you and then artillery fire on him until he dies.

There are two ways to get this achievement:
The normal R40 weapon that needs for you to have 100 Weapon Mastery on the weapon you are in (Item world), in a mystery room you will find an altar with such weapon.
The other way is a Carnage R40 weapon, which you need to be inside an R39 carnage item.

The mystery room looks like this: